import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
      home: Scaffold(
    appBar: AppBar(
      title: const Text("你好flutter"),
    ),
    body: const MyApp(),
  )));
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemCount: 20,
      itemBuilder: (context, index) {
        return ListTile(
          title: Text("第 $index 个item"),
        );
      },
    );
  }
}
